Earlier this year we reported on a hunt for barbastelle roosts at Swineshead Wood.
Daniel Hargreaves made a film of one of the roosts and managed to capture both emergence ( you will need to look hard) and also dawn swarming. The roost was a long way above the ground and was pretty inaccessible. He has now sent us a copy of his film. You can download it here. ( This is a big 230Mb file). You can view it at lower res on You Tube